Re: [Qemu-devel] [PATCH v2 0/7] APIC/IOAPIC cleanup

[Avi Kivity]

 On 08/23/2010 12:07 AM, Anthony Liguori wrote:
> On 08/22/2010 02:44 PM, Avi Kivity wrote:
> > > No more MI diamond and all devices have DeviceStates.  
> > > Coincidentally, it matches more closely how hardware works..
> >
> >
> > Well, I agree, but I honestly lost the context.  How does this relate 
> > to the APIC and cpu hotplug?
> >
> > I'll take the opportunity to say that we should be using a language 
> > that has first-class (...) support for these concepts instead of 
> > having to divine them from the code.
>
> At the risk of sounding uncool, I think what we really need is a UML 
> diagram describing the device tree.  It's really not that much more 
> difficult to create a similar mess in C++.

That's fine near a whiteboard with some airspace for handwaving.  
Doesn't work well through patches and email.

The advantage of better language support is that it's easier to 
resurrect the model from the code; it doesn't give you a better or worse 
model by itself.

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.